NP8P128A13BSM60E Datasheet, PDF (46/92 Pages) Numonyx B.V – 128-Mbit Parallel Phase Change Memory

Numonyx® Omneo™ P8P Datasheet
12.4.3
Read identification (RDID)
The read identification (RDID) instruction allows to read the device identification data:
• Manufacturer identification (1 byte)
• Device identification (2 bytes)
The manufacturer identification is assigned by JEDEC, and has the value 20h for
Numonyx.
Any read identification (RDID) instruction while an erase or program cycle is in
progress, is not decoded, and has no effect on the cycle that is in progress.
The device is first selected by driving Chip Select (S#) Low. Then, the 8-bit instruction
code for the instruction is shifted in. After this, the 24-bit device identification stored in
the memory will be shifted out on serial data output (DQ1). Each bit is shifted out
during the falling edge of Serial Clock (C).
The read identification (RDID) instruction is terminated by driving Chip Select (S#)
High at any time during data output.
When Chip Select (S#) is driven High, the device is put in the standby power mode.
Once in the standby power mode, the device waits to be selected, so that it can
receive, decode and execute instructions.
Figure 11: Read identification (RDID) instruction sequence and data-out sequence
S
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 28 29 30 31
C
Instruction
D
Manufacturer identification
Device identification
High Impedance
Q
15 14 13
3210
MSB
MSB
AI06809c
Datasheet
46
July 2010
316144-07